FabSpeed BMW M3 E90 / 92 / 93 Performance Package

HJS German imported catalytic converters are made from some of the highest grade materials you can find in a catalytic converter. This yields high performance gains and longevity so it wont deteriorate over time like lower grade catalytic converters. These catalytic converters flow up to 93-95% of a straight pipe in most applications. The benefit is that you get the "straight pipe sound" while still being able to provide enough emissions scrubbing to prevent a check engine light.     Complete high-performance exhaust solution for the E90/92/93 M3; includes Maxflo Performance Exhaust System, Secondary Catbypass X-Pipe, 200-cell HJS Primary Sport Catalytic Converters, BMC F1 Air Filter and an optional ECU Handheld Tuner Upgrade.                                  Fabspeed's E90/92/93 M3 Performance Package replaces the restrictive OEM rear mufflers for a deeper, throatier exhaust note and improved power and throttle response.  The included secondary Catbypass X-Pipe replaces the redundant